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<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
    <script src="../../js/plan/material.js"></script>
</head>
<body onload="showImageOrVideo()">
<img id="_material_image" alt="image" width="50%" height="50%">
<video id="_material_video" width="640" height="480" controls autoplay>
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</video>
</body>
</html>